Enjoy the excitement and all the the challenges you will face. Here's my advice: draw from your previous experience, but remember that you will need to learn a lot. If you have a healthy respect for what you don't know and are willing to ask questions and do a little investigation, you should do fine. And know that it may take longer for you to feel like you can "fly" than it did in your previous position.
Hopefully you will be working with people who are willing to teach and share from their experiences, and where there is a real sense of teamwork. In high-stress situations, teamwork can make the difference between a horrible shift and a challenging shift full of adrenaline.
Congratulations on your new position, and enjoy!